CVE-2026-63393 json
OpenSearch SQL plugin: Unsafe cursor deserialization permits server code execution
published 2026-10-30 9 d ago modified 2026-11-02 6 d ago also EUVD-2026-114543
- cvss
- 8.7
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 43%
- public exploits
- 0
- none known
Summary
OpenSearch SQL supports querying OpenSearch data using SQL and Piped Processing Language. In the 2.x line from 2.8.0.0 until 2.19.6.0, and the 3.x line prior to 3.7.0.0, a remote authenticated user with basic read/search permissions can provide a crafted `cursor` parameter to the `plugins/sql` endpoint and trigger unsafe deserialization of untrusted data, resulting in arbitrary code execution on the server. This issue is fixed in repository releases 2.19.6.0 and 3.7.0.0.
Patch / fix
- github.com/opensearch-project/sql@402a284 commit
- github.com/opensearch-project/sql@9ab5038 commit
- github.com/opensearch-project/sql#5469 pull request
- github.com/opensearch-project/sql#5572 pull request
- github.com/opensearch-project/sql/releases/tag/2.19.6.0 release
- github.com/opensearch-project/sql/releases/tag/3.7.0.0 release
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 6 d ago
Exploit prediction
0.50% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- opensearch-project sql
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
- github.com /opensearch-project/sql/pull/5469
- github.com /opensearch-project/sql/pull/5572
- github.com /opensearch-project/sql/commit/402a284f1dff3545236480b67f860aa93fb667de
- github.com /opensearch-project/sql/commit/9ab50384d3ad571a14211415fba2f6d26d4c80db
- github.com /opensearch-project/sql/security/advisories/GHSA-r8cv-xvqm-4qj4
- github.com /opensearch-project/sql/releases/tag/2.19.6.0
- github.com /opensearch-project/sql/releases/tag/3.7.0.0
Sources
- CVE List CVE-2026-63393
- NVD CVE-2026-63393
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.